重庆巫山地区地震波<i>Q</i>值结构研究

汪建; 李光科; 杨亚运; 王同军

doi:10.19987/j.dzkxjz.2022-065

重庆巫山地区地震波Q值结构研究

doi: 10.19987/j.dzkxjz.2022-065

重庆市地震局，重庆 401147

基金项目: 中国地震局监测、预报、科研三结合项目（3JH-2021040）和重庆市地震局科研项目联合资助。

详细信息

通讯作者:
汪建（1987-），男，工程师，主要从事重复地震、地壳介质等研究。E-mail：373271967@qq.com

中图分类号: P315.3⁺1
计量
- 文章访问数: 121
- HTML全文浏览量: 60
- PDF下载量: 12
出版历程
- 收稿日期: 2022-04-21
- 修回日期: 2022-05-27
- 网络出版日期: 2022-06-15

Study on seismic Q structure in Wushan area of Chongqing Municipality

Chongqing Earthquake Agency, Chongqing 401147, China

摘要

摘要: 选取重庆数字地震台网2010年1月—2016年12月记录的巫山地区M_L≥2.0地震波形资料，利用Atkinson方法计算了重庆巫山地区介质品质因子Q值。结果显示，介质品质因子Q( f )与频率f的关系为Q( f )=175.7f ^0.75，巫山地区的Q值高于邻区（巴东和湖北地区）。结合地震活动性分析，该区域构造相对稳定。
- Atkinson方法 /
- Q值 /
- 介质品质因子 /
- 巫山地区
Abstract: The seismic waveform data of M_L≥2.0 earthquakes recorded by Chongqing Digital Seismic Network were collected between January 2010 and December 2016 for investigating Q structure in Wushan area by using the Atkinson method. A frequency-dependent Q model Q( f )=175.7f ^0.75 is obtained for the Wushan area, where the Q is higher than that in its adjacent area, including Badong and Hubei areas. Combining with seismicity, the Q result suggests that the Wushan area is relatively stable.
- Atkinson method /
- Q Value /
- medium quality factor /
- Wushan area

HTML全文

图 1 台站和震中分布

Figure 1. Locations of earthquakes (circle) and stations (black triangle) used in this study

下载: 全尺寸图片幻灯片

图 2 台站与地震射线路径的分布

Figure 2. Distribution of rays between the stations and earthquakes

下载: 全尺寸图片幻灯片

图 3 建坪（JIP）台记录的重庆巫山M_L3.7地震波形及S波窗范围

Figure 3. Waveform and S wave window region of Wushan M_L3.7 earthquake recorded by Jianping Station

下载: 全尺寸图片幻灯片

图 4 建坪（JIP）台记录的巫山M_L3.7地震S波的位移谱和事件前噪声谱

上、下曲线分别为地震S波窗内记录与噪声的FFT变换

Figure 4. Displacement and noise spectra of S-waves from the Wushan M_L3.7 earthquake recorded by Jianping Station

下载: 全尺寸图片幻灯片

图 5 巫山地区介质品质因子Q与频率f的关系

Figure 5. Relationship between Q value and frequency in Wushan area

下载: 全尺寸图片幻灯片

参考文献(16)

[1]	肖孟仁,陈浩,罗丽,等. 江西地区地震动非弹性衰减和场地响应特征研究[J]. 大地测量与地球动力学,2020,40(3):287-290,298 Xiao M R,Chen H,Luo L,et al. Study on inelastic attenuation and site response in Jiangxi area[J]. Journal of Geodesy and Geodynamics,2020,40(3):287-290,298
[2]	Rainner T. Comparison of seven methods for the computation of Q[J]. Physics of the Earth and Planetary Interriors,1989,55(3/4):259-268
[3]	Atkinson G M,Mereu R F. The shape of ground attenuation curves in southeastern Canada[J]. Bulletin of Seismological Society of America,1992,82(5):2014-2031 doi: 10.1785/BSSA0820052014
[4]	龙政强,孙学军,姚宏,等. 广西地区地震动衰减Q值和场地响应研究[J]. 地震地磁观测与研究,2014,35(5/6):15-20 Long Z Q,Sun X J,Yao H,et al. The study of vibration attenuation Q value and site response in Guangxi region[J]. Seismological and Geomagnetic Observation and Research,2014,35(5/6):15-20
[5]	吴微微,苏金蓉,魏娅玲,等. 四川地区介质衰减、场地响应与震级测定的讨论[J]. 地震地质,2016,38(4):1005-1018 doi: 10.3969/j.issn.0253-4967.2016.04.016 Wu W W,Su J R,Wei Y L,et al. Discussion on attenuation characteristics,site response and magnitude determination in Sichuan[J]. Seismology and Geology,2016,38(4):1005-1018 doi: 10.3969/j.issn.0253-4967.2016.04.016
[6]	李丹宁,马志斌,续外芬,等. 云南地区非弹性衰减系数及场地响应研究[J]. 大地测量与地球动力学,2016,36(12):1041-1046 Li D N,Ma Z B,Xu W F,et al. Study of non-elasticity attenuation and site response in Yunnan[J]. Journal of Geodesy and Geodynamics,2016,36(12):1041-1046
[7]	郁建芳,谢石文,张炳,等. 安徽地区震源参数的相关性研究[J]. 华南地震,2019,39(3):32-41 Yu J F,Xie S W,Zhang B,et al. Study on source parameters and its similar relationship of earthquakes occurred in Anhui region[J]. South China Journal of Seismology,2019,39(3):32-41
[8]	华卫,陈章立,郑斯华,等. 三峡水库地区震源参数特征研究[J]. 地震地质,2010,32(4):533-542 doi: 10.3969/j.issn.0253-4967.2010.04.001 Hua W,Chen Z L,Zheng S H,et al. A study on characteristics of source parameters in Three Gorges Reservoir area[J]. Seismology and Geology,2010,32(4):533-542 doi: 10.3969/j.issn.0253-4967.2010.04.001
[9]	魏贵春,张丽芬,申学林,等. 三峡工程水库重点监视区不同蓄水阶段地震波Q值分析[J]. 大地测量与地球动力学,2017,37(6):651-654,660 Wei G C,Zhang L F,Shen X L,et al. Q value analysis of the Three Gorges Project at different water impoundment stages[J]. Journal of Geodesy and Geodynamics,2017,37(6):651-654,660
[10]	王同军,陈凯,姜维松,等. 重庆石柱地区介质非弹性衰减、台站场地响应及震源机制研究[J]. 防灾减灾学报,2016,32(2):58-64 Wang T J,Chen K,Jiang W S,et al. Research on inelastic attenuation response and focal mechanism in Shizhu region,Chongqing[J]. Journal of Disaster Prevention and Reduction,2016,32(2):58-64
[11]	汪建,王同军,杨亚运,等. 利用重复地震观测重庆巫山地区地壳介质变化[J]. 地震地磁观测与研究,2018,39(6):16-22 doi: 10.3969/j.issn.1003-3246.2018.06.003 Wang J,Wang T J,Yang Y Y,et al. Monitoring crustal media variation in Wushan area of Chongqing Municipality by using repeated earthquakes[J]. Seismological and Geomagnetic Observation and Research,2018,39(6):16-22 doi: 10.3969/j.issn.1003-3246.2018.06.003
[12]	汪建,张巡,杨亚运,等. 重庆地区重复地震识别及在数字地震台网定位评价中的应用[J]. 地震地磁观测与研究,2020,41(2):37-43 doi: 10.3969/j.issn.1003-3246.2020.02.005 Wang J,Zhang X,Yang Y Y,et al. Recognition of repeating earthquakes in Chongqing Area and its application in location evaluation of digital seismic network[J]. Seismological and Geomagnetic Observation and Research,2020,41(2):37-43 doi: 10.3969/j.issn.1003-3246.2020.02.005
[13]	丁仁杰, 李克昌, 等. 重庆地震研究[M]. 北京: 地震出版社, 2004: 28-40 Ding R J, Li K C, et al. Chongqing earthquake research[M]. Beijing: Seismological Press, 2004: 28-40
[14]	张永久,赵翠萍. 紫坪铺水库库区介质衰减、台站响应和震源参数研究[J]. 地震地质,2009,31(4):664-675 doi: 10.3969/j.issn.0253-4967.2009.04.010 Zhang Y J,Zhao C P. Study of attenuation characteristics,site response and seismic source parameters of the Zipingpu reservoir region[J]. Seismology and Geology,2009,31(4):664-675 doi: 10.3969/j.issn.0253-4967.2009.04.010
[15]	周连庆,赵翠萍,修济刚,等. 利用天然地震研究地壳Q值的方法和进展[J]. 国际地震动态,2008(2):1-11 doi: 10.3969/j.issn.0253-4975.2008.02.001 Zhou L Q,Zhao C P,Xiu J G,et al. Methods and developments of research on crustal Q value by using earthquakes[J]. Recent Developments in World Seismology,2008(2):1-11 doi: 10.3969/j.issn.0253-4975.2008.02.001
[16]	华卫,陈章立,郑斯华,等. 水库诱发地震与构造地震震源参数特征差异性研究−以龙滩水库为例[J]. 地球物理学进展,2012,27(3):924-935 doi: 10.6038/j.issn.1004-2903.2012.03.013 Hua W,Chen Z L,Zheng S H,et al. Differences existing in characteristics of source parameters between reservoir induced seismicity and tectonic earthquake−A case study of Longtan reservoir[J]. Progress in Geophysics,2012,27(3):924-935 doi: 10.6038/j.issn.1004-2903.2012.03.013